I know many people that go to church for their own gain. To be seen as a pillar of the community because they sit in church on Sundays. Politics if anything.
I even know a doctor that is a homosexual, but has a girlfriend that he takes to church every Sunday to be seen with a woman. They have no other relationship other than he picks her up Sunday mornings and goes to church. This poor girl cant understand why the dont move forward in the relationship. He drops her off and goes home to his "room mate" of 15 years."See you next Sunday".
That is truly sad. Especially if others in that church know about it and say nothing. Alternatively, we do not know what is in this person's heart. Perhaps a part of him is trying to change. But 15 years is a long time so your assessment is probably correct. Sad for the person and that church.